Dolphins. Photo by Bob Andres
Trainer Joyce Hazelof plays with dolphins behind the glass of the underwater restaurant at Dolphinarium, Harderwijk, Netherlands. Picture: Action Press / Rex Features
Pink dolphins leap in Hong Kong waters. The Hong Kong Dolphin Conservation Society says increasing high-speed ferry traffic is contributing to a dramatic decline in the numbers of pink dolphins - or Chinese white dolphins - in the city’s waters. Picture: Hong Kong Dolphin Conservation Society/AFP/Getty
A vet from the Zoological Foundation of El Salvador uses a stethoscope to examine a female dolphin in San Diego. A female and a male dolphin were rescued by local fishermen after they were found beached in two different spots along the coastline. Both animals have scratches and lacerations on their bodies and have been refusing food. Photograph: Ulises Rodriguez/REUTERS
A diver dressed as Santa Claus swims with dolphins at Hakkeijima Sea Paradise in Yokohama, south of Tokyo, Picture: REUTERS/Yuriko Nakao
Amazon river dolphins photographed by wildlife photographer Mark Carwardine. Picture: Mark Carwardine/SeaPics/Solent News
A rescued baby river dolphin is cared for by biologists on the Pailas River in Santa Cruz, Bolivia. Photograph: Dado Galdieri/AP
Surfers wait for waves as dolphins frolic in the water at Bondi Beach in Sydney. Picture: REUTERS/Daniel Munoz
Keo, a 12-year-old dolphin at Dolphin Quest Hawaii, swims with her newborn calf. Picture: Dolphin Quest Hawaii/AP
Freediver Leina Sato swims with a pod of spinner dolphins off the coast of Hawaii. Picture: Bo Pardau/National News and Pictures
Bottlenose dolphin Rainbow and her newborn calf play in the waters in Moray Firth, Scotland. Picture: Tim Stenton / Barcroft Media